well i feel slightly stupid. my trouble free for the last 13yrs cooling system somehow became 1/2gal low. gave everything a once over and no sign of cracked hoses, leaking heater cores, or leaking headgasket, so i'll have to keep an eye on it

it's all topped off and bled now, and pumping out some serious heat like it always has

 

Old thread but my trucks heat was feeble at best this year so i back flushed the heater core…blistering heat returned…i was this far away from pulling the dash to replace heater core. Ive pulled a dash from my Toyota parts truck and still have that mint dash in my storage building but im in no hurry to install it